Concrete-reinforcing member.



O. T.-I'NMAN & H. A. ROBINSON. CONCRETE REINPORCING MEMBER. APLIUATION FILED 2.113.111, 1907.

A 1,050,834. l v Patented .12111.21, 1913.

UNITED STATES PATENT OFFICE.

CHARLES T. INMAN ANI) HENRY A. ROBINSON, 0F AKRON, OHIO.

CONCRETE-REINFORCING MEMBER.

Specification of Letters Patent.

Application filed February 18, 1907. Serial No. 358,057.

To all whom t may concern."

Be it known that we, CHARLES T. INMAN and HENRY A. ROBINSON, citizens of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented new and useful Improvements in Concrete-Reinforcing Members, of which the following is a specification. j

As the object of this invention, it will be stated that in the construction of concrete work it frequently happens that it is necessary to lap the mechanical elements employed for strengthening purposes, and under certain conditions it is requisite that the various binders employed in a given work intersect each other and engage each other sufficiently irmly to unite the entire massl into an integral body. In View of the foregoing it therefore becomes an essential element of this invention that the means for connecting the various portions of the binder together, either when they are lapped or when they int-ersect'each other, be of such a configuration that they will unite with each other without a reformation of the bar or the necessity of making the same of a particular shape to lit a particular piecev of work; in other words, to make the fastening or interlocking feature of the bar of a universal pattern which will make its use adaptable to any contingency, thereby supplying a universal locking device capable of uniting a plurality of elements, as well as serving the purpose of perfect engagement with the concrete material in which the same is embedded.

A practical embodiment of our invention is illustrated v-in the accompanying drawing in which similar reference numerals indicate like parts.

Eigure 1 is a perspective view of a portion of a bar embodying our invention, and Fig. 2 is a perspective view of a portion of a plurality of bars, each bar in accordance with our invention, illustrating the vmanner in which duplicate bars extending in planes intersecting each otherat an angle may be interlocked. 4

It will be stated before giving a specific description of the invention, that the interlocking feature which forms a primary object of this invention is applicable' to any bar in which the transverse dimensions are approximately equal, thereby making its use substantially universal inv all contingencies. In order to illustrate, there` is shown in the drawing, a bar substantially surface, and formed along the medial line of each face of the bar and spaced apart from the side edges. of suchfaces. As Shown, the reference numeralQ designates depressions on one side of the bar, and 5` On 'the opposite side of l the protuberance. y the bar, the depressions are designated by the reference numeral 10, and the protubi erances by the reference numeral 9,- so`that opposite the depressions 2, are protuberances 9, and opposite. rthe protuberances 9 are depressions 2. The protuberances and depressions are of identical contour and size and are preferably'madecircular and are each given a slight bevel in order to make their manufacture and use easier; but they may be made perfectly cylindrical without departing from the scope of this invention. In view of the fact that these depressions and protuberances are of identical size, two bars of the saine contour may be lapped and the protuberances of one bar will nicely fit in the depressions of a complementary bar and engage therewith a suficient tenacity as to prevent their accidental release; especially, when supplemented by the fact that the lapped bars are surrounded by an inclosing mass of concrete.

The drawing shows a bar wherein the transverse diameters are substantially equal, and the same description in relation to the formation of protuberances and depressions already given, applies to the remaining two opposite sides of the bar, the depressions 6 on one side being opposite the protuberances 7 on the opposite side.

As will be seen, the facial configuration of two contiguous faces is similar with respect to the protuberances` or projections and depressions, the difference being however, that the positions of the projections and depressions are so arranged that these elements are out of cross-sectional alinement, the elements of one face being inter- .spaced With respect to the elements of the adjacent face, the constant cross-section of the barthowever, providing that opposite faces have the elements in cross-sectional alinement. By this particular arrangement, it will be readily understood and as illustrated in Fig. 2 that either of any two contiguous faces of the bar may have interengagement wlth a similar face of a corl responding bar and by interlocking either longitudinally of or at an angle to such face, the planes of contiguous faces however, mtersectlng each other at an angleso that the bar may act as a support for two' v'bars each engaging the bar, but having the 4 engagement with different contiguous faces and extending in such intersecting planes. The bar as above described therefore diers from theprior known devices in bark form,

. in which projections and depressions consti- Letters Patent, is

1.l A reinforcing member for concrete construction comprising a bar having more than two faces, two contiguous faces thereof being plane surfaced and each having i equally-spaced projections and depressions of similar configuration and size in alternating arrangement, each face of the bar being in the plane of the bases of the projections on said face, the projections and depressions of one face being out of cross-sectional alinement with those of the contiguous faces.

2.- A reinforced member for concrete construction comprising a bar having more than two faces, each face being plane surfaced and having equally-spaced projections and depressions of similar configuration and size in alternating arrangement, each face of the bar being in the plane of the bases of the projections on said face, the projections and depressions of one face being out of cross-sectional alinement with those of the contiguous faces.

In testimon whereof we have hereunto set our hands 1n presence of two subscribing witnesses. f

CHARLES T. INMAN. HENRY A. ROBINSON.

-Witnesses:

GLENARA Fox, C. E. HUMPHREY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. D. 

